Lithium battery negative electrode material graphitization waste gas collection device

Abstract

The utility model discloses a lithium battery cathode material graphitization waste gas collecting device which comprises a frame body, the gas collecting hood is arranged at the bottom of the frame body in a lifting manner; the gas collecting hood is provided with a cavity, the top of the gas collecting hood is provided with a first exhaust port communicated with the cavity, and the inner wall of the gas collecting hood is provided with a second exhaust port communicated with the cavity and a plurality of gas inlet holes; and the exhaust pipe is telescopic, and one end of the exhaust pipe is connected with the second exhaust port. According to the scheme, waste gas overflowing from the edge of the furnace cover can be effectively collected, and the waste gas is prevented from polluting air.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas collection, and in particular to a waste gas collection device for graphitization of negative electrode materials of lithium batteries. Background Art

[0002] As a key component of lithium-ion batteries, the quality of lithium battery negative electrode materials has a decisive influence on the performance of lithium-ion batteries. The negative electrode materials currently used are mainly graphite materials with different degrees of graphitization, including modified natural graphite, artificial graphite and composite graphite. The graphitization process is one of the core processes of negative electrode material products. During the production process, the graphite raw materials and insulation materials need to be heated to a high temperature of about 2400°C in a graphitization furnace. During the entire graphitization process, some high-temperature volatile gases will be generated, which not only have a pungent smell and corrosive environment, but also react with water vapor or small water droplets in the air to generate acid mist, which is one of the culprits of acid rain.

[0003] At present, most of the negative electrode materials of lithium batteries are graphitized in a graphitization furnace. When the graphitization furnace is working, the exhaust gas generated will easily overflow from the edge of the furnace cover. Utility Model Content

[0004] The utility model aims to provide a waste gas collection device for graphitization of negative electrode materials of lithium batteries, which can collect waste gas overflowing from the edge of a furnace cover.

[0005] The utility model is realized by the following technical solutions:

[0006] A device for collecting waste gas from graphitization of negative electrode materials of lithium batteries, comprising:

[0007] Frame;

[0008] An air collecting hood is escalably arranged at the bottom of the frame; the air collecting hood has a cavity, a first exhaust port communicating with the cavity is arranged at the top, and a second exhaust port communicating with the cavity and a plurality of air inlet holes are arranged on the inner wall;

[0009] The exhaust pipe is retractable and one end of the exhaust pipe is connected to the second exhaust port.

[0010] In a further technical solution, two guide rails are further included, and the frame is slidably arranged between the two guide rails.

[0011] In a further technical solution, the top of the guide rail has a protrusion, the bottom of the frame has a slide groove, and the protrusion is embedded in the slide groove.

[0012] In a further technical solution, a first driving mechanism is also included, wherein the first driving mechanism includes a first motor, a rack and a first gear;

[0013] The top of the guide rail is also provided with a groove along the length direction, the rack is arranged in the groove, the first gear is rotatably arranged at the bottom of the frame and meshes with the first gear; the first motor is used to drive the first gear to rotate.

[0014] In a further technical solution, the frame is rotatably provided with a sleeve structure, and a connecting column is provided on the top of the air collecting hood, and the connecting column is threadedly connected to the sleeve structure.

[0015] In a further technical solution, a second driving mechanism is also included, wherein the second driving mechanism includes a second gear, a third gear and a second motor;

[0016] The second gear is arranged on the sleeve structure, the third gear is rotatably arranged on the frame and meshes with the second gear; the second motor is used to drive the third gear to rotate.

[0017] In a further technical solution, the first exhaust port is connected to the purification tower via a retractable bellows and a vacuum pump.

[0018] In a further technical solution, the bottom of the exhaust pipe has a handle.

[0019] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0020] The utility model of the graphitization waste gas collection device for lithium battery negative electrode materials first connects the exhaust pipe to the waste gas discharge port of the graphitization furnace, then drives the gas collecting hood to move downward to cover the edge of the furnace cover of the graphitization furnace; the waste gas overflowing from the edge of the furnace cover is discharged through the air inlet and the first exhaust port in sequence; the waste gas of the graphitization furnace is discharged in the direction of the exhaust pipe-the second exhaust port-the first exhaust port. Through the above scheme, the utility model can effectively collect the waste gas overflowing from the edge of the furnace cover to prevent the waste gas from polluting the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is the front view of the utility model;

[0023] Figure 3 for Figure 2 A in the enlarged view;

[0024] Figure 4 The figure is a schematic diagram of the connection between the air collecting hood and the exhaust pipe;

[0025] Figure 5 A partial cross-sectional view of the frame.

[0026] Icons: 1-frame, 1a-slide groove, 11-sleeve structure, 2-guide rail, 2a-groove, 21-protrusion, 3-air collecting hood, 3a-cavity, 3b-first exhaust port, 3c-second exhaust port, 3d-air inlet, 31-connecting column, 4-first driving mechanism, 41-first motor, 42-rack, 43-first gear, 5-second driving mechanism, 51-second gear, 52-third gear, 53-second motor, 6-exhaust pipe, 61-handle. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. They are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0032] Please refer to Figure 1-Figure 5 A device for collecting waste gas from graphitization of negative electrode materials of lithium batteries comprises a frame 1, a gas collecting hood 3, an exhaust pipe 6, a first driving mechanism 4, a second driving mechanism 5 and two guide rails 2.

[0033] like Figure 1 and Figure 4 As shown, there is a cavity 3a between the inner wall and the outer wall of the gas collecting hood 3, and a first exhaust port 3b communicating with the cavity 3a is provided on the top, and the first exhaust port 3b is connected to the purification tower through a telescopic bellows and an air pump; the inner wall is provided with a second exhaust port 3c communicating with the cavity 3a and a plurality of air inlet holes 3d; the exhaust pipe 6 is telescopic, and the present embodiment is preferably a telescopic bellows, which is arranged in the gas collecting hood 3, and one end is connected to the second exhaust port 3c; when in use, the exhaust pipe 6 is first connected to the exhaust port of the graphitization furnace, and then the gas collecting hood 3 covers the edge of the furnace cover, and the exhaust gas overflowing from the edge of the furnace cover is discharged to the purification tower through the air inlet holes 3d and the first exhaust port 3b in turn, and the exhaust gas of the graphitization furnace is discharged to the purification tower along the direction of the exhaust pipe 6-the second exhaust port 3c-the first exhaust port 3b.

[0034] In this embodiment, the outer wall of the bottom of the exhaust pipe 6 has a handle 61, which is convenient for the operator to pull the exhaust pipe 6 to extend or shorten.

[0035] like Figure 1 and Figure 2 As shown, the gas collecting hood 3 is liftably arranged at the bottom of the frame 1; specifically, the frame 1 is rotatably provided with a sleeve structure 11, and a connecting column 31 is provided on the top of the gas collecting hood 3, and the connecting column 31 is threadedly connected to the sleeve structure 11; by rotating the sleeve structure 11, the connecting column 31 is driven to drive the gas collecting hood 3 to move up and down, so that the gas collecting hood 3 is close to or away from the graphitization furnace.

[0036] like Figure 1 and Figure 2 As shown, the second driving mechanism 5 includes a second gear 51, a third gear 52 and a second motor 53; the top of the sleeve structure 11 passes through the frame 1 and is connected to the second gear 51, and the third gear 52 is rotatably set on the top of the frame 1 and meshes with the second gear 51; the second motor 53 is set at the bottom of the frame 1, and the output shaft passes through the frame 1 and is connected to the third gear 52. The second motor 53 is driven to rotate forward or reverse, and the second gear 51 drives the third gear 52 to rotate, thereby rotating the sleeve structure 11. Since the connecting column 31 is threadedly connected to the sleeve structure 11, as the sleeve structure 11 rotates, the connecting column 31 drives the air collecting hood 3 to move up and down.

[0037] like Figure 1 and Figure 5 As shown, the two guide rails 2 are arranged facing each other. In this embodiment, the guide rails 2 are also set on the floor of the factory through a bracket, and the frame 1 is slidably set between the two guide rails 2; specifically, the tops of the two guide rails 2 respectively have protrusions 21, and the bottoms of both sides of the frame 1 are respectively provided with sliding grooves 1a, and the protrusions 21 are embedded in the sliding grooves 1a, thereby realizing the sliding connection between the frame 1 and the two guide rails 2.

[0038] like Figure 1-Figure 3 As shown, the first driving mechanism 4 includes a first motor 41, a rack 42 and a first gear 43. A groove 2a is also provided at the top of the guide rail 2 along the length direction. The rack 42 is arranged in the groove 2a. The first gear 43 is rotatably arranged at the bottom of the frame 1 and meshes with the first gear 43. The first motor 41 is arranged at the top of the frame 1, and its output shaft passes through the frame 1 and is connected to the first gear 43. The first gear 43 is driven to rotate by the first motor 41, so that the frame 1 can slide along the guide rail 2 to change the position of the gas collecting hood 3 to cover different graphitization furnaces.

[0039] The working principle of this embodiment is:

[0040] First, the exhaust pipe 6 is connected to the exhaust port of the graphitization furnace, and then the gas collecting hood 3 is driven to move downward to cover the edge of the furnace cover of the graphitization furnace; the exhaust gas overflowing from the edge of the furnace cover is discharged through the air inlet 3d and the first exhaust port 3b in sequence; the exhaust gas of the graphitization furnace is discharged in the direction of the exhaust pipe 6-the second exhaust port 3c-the first exhaust port 3b.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for collecting waste gas from graphitization of negative electrode materials of lithium batteries, characterized in that: include: Frame; An air collecting hood is escalably arranged at the bottom of the frame; the air collecting hood has a cavity, a first exhaust port communicating with the cavity is arranged at the top, and a second exhaust port communicating with the cavity and a plurality of air inlet holes are arranged on the inner wall; The exhaust pipe is retractable and one end of the exhaust pipe is connected to the second exhaust port.

2. A graphitization waste gas collection device for lithium battery negative electrode materials according to claim 1, characterized in that: It also includes two guide rails, and the frame body is slidably arranged between the two guide rails.

3. A graphitization waste gas collection device for lithium battery negative electrode materials according to claim 2, characterized in that: The top of the guide rail is provided with a protrusion, the bottom of the frame is provided with a slide groove, and the protrusion is embedded in the slide groove.

4. A device for collecting waste gas from graphitization of negative electrode materials of lithium batteries according to claim 2 or 3, characterized in that: Also included is a first driving mechanism, the first driving mechanism comprising a first motor, a rack and a first gear; The top of the guide rail is also provided with a groove along the length direction, the rack is arranged in the groove, the first gear is rotatably arranged at the bottom of the frame and meshes with the first gear; the first motor is used to drive the first gear to rotate.

5. The device for collecting waste gas from graphitization of negative electrode materials of lithium batteries according to claim 1, characterized in that: The frame is rotatably provided with a sleeve structure, and a connecting column is provided on the top of the gas collecting hood, and the connecting column is threadedly connected with the sleeve structure.

6. A graphitization waste gas collection device for lithium battery negative electrode materials according to claim 5, characterized in that: Also included is a second drive mechanism, the second drive mechanism including a second gear, a third gear and a second motor; The second gear is arranged on the sleeve structure, and the third gear is rotatably arranged on the frame and meshes with the second gear; The second motor is used to drive the third gear to rotate.

7. A device for collecting waste gas from graphitization of negative electrode materials of lithium batteries according to claim 1, characterized in that: The first exhaust port is connected to the purification tower through a telescopic bellows and an exhaust pump.

8. The device for collecting waste gas from graphitization of negative electrode materials of lithium batteries according to claim 1, characterized in that: The bottom of the exhaust pipe is provided with a handle.

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